INfelizmente encontrei uma lista que fala sobre as placas não suportadas pelo XGL. A minha é uma delas...
A referencia onde eu encontrei está no site:
http://gentoo-wiki.com/HARDWARE_Video_Card_Support_Under_XGL
Placas não suportadas....
* ATI Technologies Inc R200 BC [Radeon All in Wonder 8500] (with ati-drivers-8.22.5, Distorted screen)
* ATI Technologies Inc R200 QL [Radeon 8500 LE] (with ati-drivers-8.22.5, Distorted screen)
* ATI Technologies Inc RV280 (5960) [Radeon 9200 Pro] (with ati-drivers-8.22.05, Distorted screen)
* ATI Technologies Inc RV280 (5961) [Radeon 9200] (Kororaa XGL Live CD 0.1, Distorted screen)
* ATI Technologies Inc RV280 (5964) [Radeon 9200SE] (with ati-drivers-8.22.5, Distorted screen)
o Works for me. Got a distorted screen in rootless mode, but standalone server (using startxgl script) works perfectly on xorg drivers (modular xorg-x11 7.0-r1)
* ATI Technologies Inc R200 [FireGL 8800] (with ati-drivers-8.22.5, Distorted screen)
* ATI Technologies Inc Radeon 9800 XT (Kororaa XGL Live CD 0.1, X-server starts but Compiz don't. No effects or decoration available. Works with ati-drivers-8.27.10)
* ATI Technologies Inc [Radeon X600] (Kororaa XGL Live CD 0.1, Distorted screen) (Note: Works for me with coffe's overlay, only distorted with the live CD.))
* ATI Technologies Inc [Radeon 7000] (Kororaa XGL Live CD 0.1, Distorted screen)
* ATI Technologies Inc M9 [Radeon Mobility 9000] (Kororaa XGL Live CD 0.1, Distorted screen)
o This one works well on my Dell Inspiron 8200, but opengl apps don't get hardware acceleration. Also some problems with video playback (use X11/Shm), but compiz works well with all effects (wobbly, cube, rotation, transparency, etc...). Just remember to add "-depth 24" to Xgl command line.
* ATI Rage Mobility M4 (Kororaa XGL Live CD 0.2)
* ATI Technologies Inc M22 [Radeon Mobility M300] Freezes machine on both 0.1 and 0.2 after a while.
* SiS 6326 (Kororaa XGL Live CD 0.1, Distorted screen)
* nVidia GeForce 4 Go 420 32Mb on Toshiba laptop(with latest nvidia-glx-1.0.8178 and nvidia-kernel-1.0.8178-r3)(problems in refreshing windows content)(with kororaa XGL Live CD 0.1 Freezed Machine)
* nVidia GeForce 7300 LE/PCI/SSE2 256MB on HP Pavilian OpenGL version string: 2.0.2 NVIDIA 87.74. SuSE 10.1 Kernel Version Linux localhost 2.6.16.21-0.13-smp #1 SMP Mon Jul 17 17:22:44 UTC 2006 i686 i686 i386 GNU/Linux. NoFlip true or False. Composite off. System Freezes after about 30 seconds after Xgl is started.
* VIA Unichrome KM400 (svn 173 openchrome.org drivers, "No screens found")
* VIA CLE266 (xorg driver; max ~400x400 window - "No screens found" if more; Support for non power of two textures missing)